MazdaManiac

iTrader: (3)

Rockville, Silver Spring.
I usually fly in National.

eastcoastrotary

Is that a serious comment? the MM kit has such a nicer torque curve and, by looking at the dynos, quicker overall engine responsiveness. barring other modifications of two vehicles racing side by side, the MM kit would at a minimum get a head start, although the mazsport might overtake it or accelerate faster starting from a higher speed.

but, it's ultimately about what you want your car to do. i personally agree with the "-" approach, but people can target whatever they want. i think that the rx-8 represents balance and grace; a high-revving, tossable car with superb responsiveness and unmatched agility for the price. mixing those characteristics with massive HP numbers doesn't work - the only way to get them is with a huge turbo, which drastically lowers your reliability, engine response, and overall "fun factor" (which I think is what MM was getting at earlier). You can get your RX8 on a magazine cover by getting it to 500hp, but you'll practically be killing the soul of an incredible machine by doing it. i think that, in the end, it's just the wrong car for the purpose and that people recognize this, hence the fact that we don't really see anyone over 400hp.

also...fantastic thread! glad the initial question was posted

MazdaManiac

iTrader: (3)

Look at the source!

09Factor

Dudes, mazsport owned wtfroflmaobbg Taj's keg.
Clamps FTW!

tajabaho1

after a year wrecking havoc on this forum and people still think I make sense, even though I do, in retro-world, but still MM sucks, his tunes are off, his turbo kit is retarded, and his turbo is wayyy off in size, his avatar sucks, he's obviously gay, he has a cat and he likes to put his cat next to a supercharger and take pics, he sells E-manage blue for a living, and is currently making a supercharger kit cus superchargers are awesome for rx8

Brettus

iTrader: (2)

This excellent post (edited out all but the two kits talked about here) by mysql illustrates what you guys are talking about .
Only issue I see with it is that in the "real world" both cars will be slipping the clutch and spinning the tyres so the torque lower down the curve is not much of an advantage unless something is done about getting traction .....Both cars will be over 6000 rpm in 1st by the time the smoke clears .
All else being equal I would pick the car with the most torque under the curve in the 6000 - 9000 range to be quickest .

That said - I would still rather have the flatter torque curve for the street . I think it would be way more practical and it would feel like you had a bigger engine

maxxdamigz

iTrader: (1)

well, you have to take all things with a grain of salt. I don't think my final tune will look anything like the mazsport graph used as I've already done 267 ft lbs at 5500 rpms which will result in a different looking torque curve (unless gutting my cat produces a huge torque shift). That said, right now I'm basically 1 car length faster than a bone stock BMW 335xi because my torque plummets due to the cat

Brettus

iTrader: (2)

Do you have the stock Mazsport turbo ? I know Scott has a few options for the turbo sizing ....
Are you using a boost controller ?

maxxdamigz

iTrader: (1)

My mods are in my profile/garage. I opted for the larger turbine side. I don't know the combination of parts that went into that 363 dyno but I'm guessing that the variations in the supporting components can make a significant difference. I'm running 11.5 psi peak (instead of 13) but if car in that dyno was up to full boost before 5000 and is not ported or using a modified IM, I'm not sure why the torque peak would be so late.

tajabaho1

maxx............how fast does your mazsport spool? when does it reach full spooling? cus mine reaches full boost @ about 4.5k rpm then it takes off, but I can feel a huge kick in the neck at about 3.5k rpm, that's when that huge jolt hits me
I have no boost controller and am running the base map......still awesome though in a full race situation, like you said, we'd probably be clutch dropping higher up, so the low down power and stuff wouldn't really matter

it would if you like to go very fast from stoplight to stop light

this way my car runs normally down low and goes really fast when I want it to, cus I need to daily drive it,

and as most people know: taj +300+whp vehicle = disaster

so yea

but if you just want an awesome all around feeling car, I think the BHR kit might be a better choice, + it's cheaper

Brettus

iTrader: (2)

Taj - are you serious man ? You didn't taj up your engine afterall ?

maxxdamigz

iTrader: (1)

I would say I'm at full boost around 4500. I have a plot of it on my desk at work along with my dyno numbers and afrs. I'm waiting on a couple things to get done before I go for final numbers. I don't really need the low end as I don't drag race and actually, after 2.5 years and 30k miles, I have yet to actually drag launch the car. Usually, I get into first fairly softly and won't usually punch it until I'm in second. I also drive the traction/stability controls on pretty much all the time. The car is really just in a drivable state rather than tuned.

05rex8

iTrader: (7)

I knew it! Your story was way too unbelievable to be true about grenading your engine. Fail.

tajabaho1

lol...

then I guess we have the same hot side housing...........

however, I must say, need some seriousness with the low end power still, even if you don't usually stay there that long anyways........I think off the line the BHR kit will probably win us in the 1st 20-30 miles

Dehacked

I asked a similar question here not too long ago. Air flow seems to be the culprit. Having no aftermarket options for an intake manifold is ridiculous to me. There is just no reason for ports in the intake manifold to open at certain RPMs in a FI application. Maybe I am wrong. A car with 500+ whp should no longer be your daily driver imho. While reliability is always important, it goes without saying in any car with a lot of power there will always be complications.